src/conf_post.h

   1 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
   2
   3 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2012
   4   Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* Commentary:
  22
  23    Rather than writing this code directly in AH_BOTTOM, we include it
  24    via this file.  This is so that it does not get processed by
  25    autoheader.  Eg, any undefs here would otherwise be commented out.
  26 */
  27
  28 /* Code: */
  29
  30 /* Include any platform specific configuration file.  */
  31 #ifdef config_opsysfile
  32 # include config_opsysfile
  33 #endif
  34
  35 #ifndef WINDOWSNT
  36 /* On AIX 3 this must be included before any other include file.  */
  37 #include <alloca.h>
  38 #if ! HAVE_ALLOCA
  39 # error "alloca not available on this machine"
  40 #endif
  41 #endif
  42
  43 #ifdef SIGNAL_H_AHB
  44 #undef SIGNAL_H_AHB
  45 #include <signal.h>
  46 #endif
  47
  48 /* This silences a few compilation warnings on FreeBSD.  */
  49 #ifdef BSD_SYSTEM_AHB
  50 #undef BSD_SYSTEM_AHB
  51 #undef BSD_SYSTEM
  52 #if __FreeBSD__ == 1
  53 #define BSD_SYSTEM 199103
  54 #elif __FreeBSD__ == 2
  55 #define BSD_SYSTEM 199306
  56 #elif __FreeBSD__ >= 3
  57 #define BSD_SYSTEM 199506
  58 #endif
  59 #endif
  60
  61 #ifdef DARWIN_OS
  62 #ifdef emacs
  63 #define malloc unexec_malloc
  64 #define realloc unexec_realloc
  65 #define free unexec_free
  66 /* Don't use posix_memalign because it is not compatible with unexmacosx.c.  */
  67 #undef HAVE_POSIX_MEMALIGN
  68 #endif
  69 /* The following solves the problem that Emacs hangs when evaluating
  70    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
  71    does not exist.  Also, setsid is not allowed in the vfork child's
  72    context as of Darwin 9/Mac OS X 10.5.  */
  73 #undef HAVE_WORKING_VFORK
  74 #define vfork fork
  75 #endif  /* DARWIN_OS */
  76
  77 /* We have to go this route, rather than the old hpux9 approach of
  78    renaming the functions via macros.  The system's stdlib.h has fully
  79    prototyped declarations, which yields a conflicting definition of
  80    srand48; it tries to redeclare what was once srandom to be srand48.
  81    So we go with HAVE_LRAND48 being defined.  */
  82 #ifdef HPUX
  83 #undef srandom
  84 #undef random
  85 /* We try to avoid checking for random and rint on hpux in
  86    configure.ac, but some other configure test might check for them as
  87    a dependency, so to be safe we also undefine them here.
  88  */
  89 #undef HAVE_RANDOM
  90 #undef HAVE_RINT
  91 #endif  /* HPUX */
  92
  93 #ifdef IRIX6_5
  94 #ifdef emacs
  95 char *_getpty();
  96 #endif
  97
  98 #undef SA_RESTART     /* not the same as defining BROKEN_SA_RESTART */
  99 #endif /* IRIX6_5 */
 100
 101 #ifdef MSDOS
 102 #ifndef __DJGPP__
 103 You lose; /* Emacs for DOS must be compiled with DJGPP */
 104 #endif
 105 #define _NAIVE_DOS_REGS
 106
 107 /* Start of gnulib-related stuff  */
 108
 109 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
 110    2.03 has it, but it also has _strtold as a stub that jumps to
 111    strtold, so use _strtold in all versions.  */
 112 #define strtold _strtold
 113
 114 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
 115 # define HAVE_LSTAT 1
 116 #else
 117 # define lstat stat
 118 #endif
 119 /* End of gnulib-related stuff.  */
 120
 121 /* Define one of these for easier conditionals.  */
 122 #ifdef HAVE_X_WINDOWS
 123 /* We need a little extra space, see ../../lisp/loadup.el and the
 124    commentary below, in the non-X branch.  The 140KB number was
 125    measured on GNU/Linux and on MS-Windows.  */
 126 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 127 #else
 128 /* We need a little extra space, see ../../lisp/loadup.el.
 129    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 130    overall, we end up wasting 130KB of pure space, because
 131    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 132    non-DOS specific files and load history; the latter is about 55K,
 133    but depends on the depth of the top-level Emacs directory in the
 134    directory tree).  Given the unknown policy of different DPMI
 135    hosts regarding loading of untouched pages, I'm not going to risk
 136    enlarging Emacs footprint by another 100+ KBytes.  */
 137 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 138 #endif
 139 #endif  /* MSDOS */
 140
 141 #ifdef USG5_4
 142 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct tchars.
 143    But get <termio.h> first to make sure ttold.h doesn't interfere.  */
 144 #include <sys/wait.h>
 145
 146 #ifdef emacs
 147 #include <sys/filio.h>
 148 #include <termio.h>
 149 #include <sys/ttold.h>
 150 #include <signal.h>
 151 #include <sys/stream.h>
 152 #include <sys/stropts.h>
 153 #include <sys/termios.h>
 154 #endif
 155 #endif  /* USG5_4 */
 156
 157 /* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
 158    SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
 159 #ifdef HAVE_NS
 160 #if defined NS_IMPL_GNUSTEP
 161 #  define SYSTEM_PURESIZE_EXTRA 30000
 162 #elif defined DARWIN_OS
 163 #  define SYSTEM_PURESIZE_EXTRA 200000
 164 #endif
 165 #endif
 166
 167 #ifdef emacs /* Don't do this for lib-src.  */
 168 /* Tell regex.c to use a type compatible with Emacs.  */
 169 #define RE_TRANSLATE_TYPE Lisp_Object
 170 #define RE_TRANSLATE(TBL, C) CHAR_TABLE_TRANSLATE (TBL, C)
 171 #ifdef make_number
 172 /* If make_number is a macro, use it.  */
 173 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
 174 #else
 175 /* If make_number is a function, avoid it.  */
 176 #define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
 177 #endif
 178 #endif
 179
 180 #include <string.h>
 181 #include <stdlib.h>
 182
 183 #if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
 184 #define NO_INLINE __attribute__((noinline))
 185 #else
 186 #define NO_INLINE
 187 #endif
 188
 189 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
 190 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 191 #else
 192 #define EXTERNALLY_VISIBLE
 193 #endif
 194
 195 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 196 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
 197 #else
 198 # define ATTRIBUTE_FORMAT(spec) /* empty */
 199 #endif
 200
 201 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
 202 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 203    ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
 204 #else
 205 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 206    ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
 207 #endif
 208
 209 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 210
 211 /* Some versions of GNU/Linux define noinline in their headers.  */
 212 #ifdef noinline
 213 #undef noinline
 214 #endif
 215
 216 #define INLINE _GL_INLINE
 217 #define EXTERN_INLINE _GL_EXTERN_INLINE
 218 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
 219 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
 220
 221 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
 222 #ifdef lint
 223 /* Use CODE only if lint checking is in effect.  */
 224 # define IF_LINT(Code) Code
 225 /* Assume that the expression COND is true.  This differs in intent
 226    from 'assert', as it is a message from the programmer to the compiler.  */
 227 # define lint_assume(cond) ((cond) ? (void) 0 : abort ())
 228 #else
 229 # define IF_LINT(Code) /* empty */
 230 # define lint_assume(cond) ((void) (0 && (cond)))
 231 #endif
 232
 233 /* conf_post.h ends here */